TILs - Fueling Curiosity, One Insight at a Time

mac set custom default folder for screenshots defaults write com.apple.screencapture location /path/to/Screenshots

incase pod install throws error xcrun:_ error: SDK "iphoneos" cannot be located run sudo xcode-select --switch /Applications/Xcode.app. souce: https://github.com/facebook/react-native/issues/18408#issuecomment-386696744

This site https://imageonline.co/ is very handy to manipulate images online without searching for imagemagick commands

a little about pseudo terminal and ruby pty and expect. and then came across this https://stackoverflow.com/a/10645406/2365673. Nice way to to have full control terminal session.

$stdout.sync = true

this helps if you are trying to write a tool which pipes to another command. the other command will be able to process the output immediately, as no buffer and periodic flush is involved.
eg. cat rules > ruby rule_engine.rb | python calculate_tax.py

Also ARGF, sort of like a streaming STDIN. pretty cool, cause of the streaming.

git subtree push --prefix heroku master for pushing a subfolder to heroku [https://stackoverflow.com/q/39197334/6220432]